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https://issues.apache.org/jira/browse/LOG4J2-407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13827656#comment-13827656
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Thomas Neidhart commented on LOG4J2-407:
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No, if you place it there, it will not work.

It was intentionally placed after the first check.
A complete fix would do it differently though:

 * if an SQLException is caught -> check if the connection is still valid
 * re-connect
 * if re-connect was successful -> re-try writing the log entry

> JDBCAppender cannot recover from loss of database connectivity
> --------------------------------------------------------------
>
>                 Key: LOG4J2-407
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-407
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Appenders
>    Affects Versions: 2.0-beta9
>            Reporter: Michael Kloster
>            Assignee: Nick Williams
>
> The JDBCAppender holds a single database connection for all its logging. If 
> that database connection is closed, it does not attempt to make a new 
> connection.
> Many connection pools automatically close connections after a certain amount 
> of inactivity. (This can be worked around by properly configuring a pool).
> Database connectivity issues are also common enough that a long running 
> application may experience temporary network issues. When the network comes 
> back online, the logging will not resume.
> I've been meaning to submit a patch for this, but I haven't gotten to it. 
> Since I saw that you are looking to come out of beta soon, I thought I would 
> log this issue in case someone else has time to write the patch before I get 
> to it.



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